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<H2><A NAME="4_5">4.5  Choosing the image format for JpGraph</A></H2>
<P> By default JpGraph automatically chooses the image format to use in
 the order PNG, JPEG and GIF. The exact format depends on what is
 available on your system. There are two ways you can influence the way
 the graphic format is chosen.</P>
<OL>
<LI> Change the default graphic format by changing the DEFINE<DIV class="phpscript">
<CODE><FONT color="#000000"> <FONT color="#0000BB">&nbsp;DEFINE</FONT><FONT color="#007700">
(</FONT><FONT color="#DD0000">&quot;DEFAULT_GFORMAT&quot;</FONT><FONT color="#007700">
,</FONT><FONT color="#DD0000">&quot;auto&quot;</FONT><FONT color="#007700">);</FONT><FONT
color="#0000BB"></FONT></FONT></CODE></DIV>
<P></P>
</LI>
<LI> Set the graphic format in your script by calling the method <A href="../ref/Image.html#_IMAGE_SETIMGFORMAT">
 SetImgFormat()</A> For example, to force your script to use JPEG in one
 specific image use<DIV class="phpscript"><CODE><FONT color="#000000"> <FONT
color="#0000BB">&nbsp;$graph</FONT><FONT color="#007700">-&gt;</FONT><FONT color="#0000BB">
img</FONT><FONT color="#007700">-&gt;</FONT><FONT color="#0000BB">
SetImgFormat</FONT><FONT color="#007700">(</FONT><FONT color="#DD0000">
&quot;jpeg&quot;</FONT><FONT color="#007700">)</FONT><FONT color="#0000BB"></FONT></FONT>
</CODE></DIV>
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